package com.bite.common.core.utils;

import com.bite.common.core.constants.JwtConstants;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.util.HashMap;
import java.util.Map;

public class JwtUtils {

    /**
     * ⽣成令牌
     *
     * @param claims 数据
     * @param secret 密钥
     * @return 令牌
     */
    public static String createToken(Map<String, Object> claims, String secret) {
        String token = Jwts.builder().setClaims(claims).signWith(SignatureAlgorithm.HS512, secret).compact();
        return token;
    }

    /***
     从令牌中获取数据
     ** @param token 令牌
     * @param secret 密钥
     * @return 数据
     */
    public static Claims parseToken(String token, String secret) {
        return Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();
    }

    public static String getUserKey(Claims claims) {
        return toStr(claims.get(JwtConstants.LOGIN_USER_KEY));
    }

    public static String getUserId(Claims claims) {
        return toStr(claims.get(JwtConstants.LOGIN_USER_ID));
    }

    private static String toStr(Object value) {
        if (value==null){
            return "";
        }
        return value.toString();
    }

    public static void main(String[] args) {
        Map<String,Object> claims=new HashMap<>();
        claims.put("userId",123);
        System.out.println(createToken(claims, "abcdefg"));
        String token="eyJhbGciOiJIUzUxMiJ9.eyJ1c2VySWQiOjEyM30.64iAe3xTBxPIHJbrBb4rMWUvXSfiGO64sg2gb3gd32RpNlPi-HrTs-MqQwZDnQXJEvAlUtiLItJrUQ9WAiYgqA";
        System.out.println(parseToken(token, "abcdefg").toString());
    }

}

